Adjustable lamp



FIG. 1 is a front elevational view of an adjustable lamp showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a perspective view thereof with the lamp sections in pivotally moved positions and the lamp shade of the uppermost lamp section in a rotationally moved position. 

The ornamental design for an adjustable lamp, as shown and described. 